How to Rapidly Draw Dotted Lines on a Chalkboard

In this episode of Learn Quick I learn to draw lines on a chalk board like the great MIT lecturer Walter Lewin.
Jinxsays...

Yes.

I also predicted the ending.

Seeing his hands covered in chalk dust made me want to wash mine thoroughly. Don't know why I didn't see that coming.

bareboards2said:

Did anyone else immediately know it was a skipping sound?

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